The Senate on Wednesday voted to start debate on the measure, which cannot be filibustered by Democrats; a final vote is expected on Thursday.

Republicans are using a procedural tactic known as the Congressional Review Act, which allows for expedited votes in the House and Senate in order to reverse Executive Branch regulations.

The CRA was approved back in 1996, part of a drive then by Republicans in Congress to get a hold of regulations; it had largely been forgotten, until GOP leaders decided to dust it off – with President Trump now ready to sign whatever rules they vote to repeal.

“Not only is the GOP Congress going to kill it,” the Sierra Club said of the stream protection rule, “they’re going to try to make sure that it never comes back,” noting one unique part of the CRA, which says once the Congress repeals a rule, regulators can’t ever approve the same thing again.

That prohibition has not yet been tested in court.

The Stream Protection vote was just the first this week in Congress – here are others on the schedule: